Vulnerability Description
A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local privilege escalation. The unix_stream_sendpage() function tries to add data to the last skb in the peer's recv queue without locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that is being released by garbage collection, resulting in use-after-free. We recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.2, < 6.1.47 |
| Debian | Debian Linux | 10.0 |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LS
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linuxIssue TrackingMailing ListPatch
- https://kernel.dance/790c2f9d15b594350ae9bca7b236f2b1859de02cPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/10/msg00027.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
- https://www.debian.org/security/2023/dsa-5492Third Party Advisory
- http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LS
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linuxIssue TrackingMailing ListPatch
- https://kernel.dance/790c2f9d15b594350ae9bca7b236f2b1859de02cPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/10/msg00027.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
- https://www.debian.org/security/2023/dsa-5492Third Party Advisory
FAQ
What is CVE-2023-4622?
CVE-2023-4622 is a vulnerability with a CVSS score of 7.8 (HIGH). A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local privilege escalation. The unix_stream_sendpage() function tries to add data to the last skb in...
How severe is CVE-2023-4622?
CVE-2023-4622 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-4622?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Debian Debian Linux.